Roll turning machine



J1me 1931- R. A. JOHNSON ET AL RQLL TURNING MACHINE 4 Sheets-Sheet l Filed May 29, 1928 INVENTORS.

A TTORNE Y.

June 23, 1931. R. A. JoHNoN ET AL 1,311,504

ROLL TURNING MACHINE Filed May 29, 1928 4 Sheets-Sheet 2 INVENTORS.

Wa BY M ML Odd-44 A TTORNE Y.

June 23, 1931. R. A. JOHNSON ET AL ROLL TURNING MACHINE 4 Sheets-Sheet 5 Filed May 29, 1928 Huhu l INVENTOR-S A TTORNE Y.

n 1931- R. A.-JOHNSON ET AL 1,811,504

ROLL TURNING MACHINE F 'iled May 29, 1928 4 Sheets-Sheet 4 H61? a2 a3 60 7 70 7 9/ INVENTORfl M1 Q\MM BY M4,, 1 4 I MQLGAZZR ATTORN'EY.

ob ect of Patented June 23, 1931 ROBERT A. JOHNSON, OF LONGMEADON,

MAESACEUSETTS, .ASSIGNOE-S TO MASSACHUSETTS, A CORPORATION OF AND EARLE Iii. CI-IAEE, OF SPRINGFIELD, MCLEGID MACHINE TOOL 00., OF HATFIELD, IMASSACHUSETTS ROLL TURNING 1'1! ACHINE Application filed May 29,

I Our invention relates to improvements in machines for turning and. dressing hollow cylindrical objects, and more particularly to the means or mechanisms for centering and holding such objects while being turned or dressed, and releasing the same.

'lextile-printing rolls require turning down and dressing ofi, after each design on such a roll has been used to the extent required, and they vary greatly in length, and have tapered bores, openings, or passages therethrough that vary to aconsiderable ex tent in size in dilierent rolls, all of which makes lb diilicult to mount, center, and prop erly and securely hold in place rolls of this character while being turned and dressed, in turning machines equipped with ordinary types of tail-stocks and chucks. The primary ur invention'is, therefore, to provide a turning machine with adequate and eiiicic-nt means and mechanism for-holding and releasing textile-printing rolls, and other rolls of a moreor less similar character re- 'a ardless of their len ths and of the sizes of their bores, within predetermined limits.

Another object is to provide, in a machine of this character, mechanism in the tail-stock whereby tne holding means for the work are advanced by a quick initial movement and a slow but forceful final movement, and said means are retracted by a slow but forceful initial movement and a quick final movement of said means, to the end that teXile-printing rolls, or other hollow cylindrical objects, of

different lengths may be expeditiously handied to advantage.

A further object is to provide the machine with chucks, each of which is capable of a wide range of expansion, wherebyv 1t 1s capable of engaging and releasing textileprinting rolls, or other'hollow cylindrical objects, having a great variety of difierent sizes of bores, even when such sizes vary greatly.

These chucks are self-engaging and self releasing and capable of exerting a great amount of force, under the impetus of the forceful final adjustment of the tailstock mechanism, with the result that the work mounted on said chucks only properly 1928. Serial No. 281,500.

centered, but is so firmly held as to preclude any possibility of slipping.

Other objects and advantages will appear in the course of the following description.

lVe attain the objects and secure the advantages of our invention by the means and mechanism illustrated in the accompanying drawings, in which- Figure l is a front elevation of a roll turning machine which embodies a practical form of our invention, parts being in section and broken away; Fig. 2, an enlarged, rear elevation of the tail-stock of said machine, and of the parts and members carried thereby, a port-ion of said tail-stock being to disclose certain of the mechanism therein; Fig. 3, an enlarged, front elevation and partial section of said tail-stock and its mechanism; Fig. l, a vertical section through the tail-stock and its mechanism, taken on lines 4 1:, looking in the direction of the associated arrow, in Fig. 2; Fig. 5, a vertical section through a portion of the tail-stock, taken on lines 55, looking in the direction of the associated arrow, in Fig. 2; Fig. 6, a sectional detail on lines 6-6, looking in the direction of the associated arrow, in Fig. 2; Fig. 7 a side elevation, on a still larger scale, of one of the chucks; Fig. 8, a front or inner end elevation of said chuck; Fig. 9, a longitudinal section through the chuck, taken on lines 99, looking in the direction of the associated arrow, in Fig. 8; Fig. 10, a front end elevation of the body of the chuck, and, Fig. 11, a sectional detail on lines 11l1, looking in the direction of the associated arrow, in Fig. 8.

Similar reference characters designate similar parts throughout the several views.

Our invention is embodied in a turning machine the old parts of which will first be briefly described.

Mounted at the ends on two bases 1 is a bed 2, and mounted on said bed at and adjacent to the ends thereof is a headstock 3 and a tail-stock 7. The tail-stock 7 is an element in the present invention, and will subsequently be described in detail, although its relationship to the bed 2 is substantially like that of any other taiLstock.

broken away the rack 37. Upon rotating the hand-wheel 48 in the opposite direction, the screw-threaded part 49 of the spindle 47 causes the clutch member 53 to be actuated rearwardly out of engagement with the clutch member 52, leaving the sleeve 39 free to be rotated by means of the hand-wheel 45. Then the sleeve 26 can be actuated by means of the hand-wheel 45, through the medium of the pinion 38 and rack 37, as before.

A key 58 maybe employed to prevent the sleeve 26 from rotating.

In the front side of the bearing 25, adjacent to the inner end thereof, is a vertical passage 59 into which opens the bore in said bearing for the sleeve 26. In the passage 59 are upper and under pinch blocks 60 and 61, respectively, which engage the portion of the sleeve 26 that is in the passage 59, above and below the horizontal, plane of said sleeve.

; There are vertical openings through the blocks 60 and 61, the opening in the lower block being screw threaded, and arod 62, which is screw-threaded at its lower terminal, is passed down through the upper block into the lower block. Mounted on and secured to the upper terminal of the rod 62, which terminal is above the block 60, is a. handle 63.

Upon grasping the handle 63 and partially rotating the same in one direction, the blocks 60 and 61 are caused to approach each other and forced into tight and binding contact 7 with the sleeve 26, thus holding said sleeve against longitudinal movement. This is due tothe fact that the hub of the handle 63 bears on top of the block 60,and the lower terminal of the rod 62 is in threaded engagement with the block 61. Upon partially rotating the handle 63 in the opposite direction, the

.' blocks 60 and 61 are caused to separate, or at least to relax their grip on the sleeve 26, thus permitting said sleeve to be moved in either direction.

In the tail-stock 7, behind the bearing 25, and intermediate of the ends of said tailstock, is a vertical passage 64." A spindle 65 is journaled at the lower end in the bottom of the passage 64, and at theupperterminal in a bearing plug 66 tapped into the upper end of the passage 64. The spindle 65 extends above the plug 66, and mounted on and secured to the upper end thereof is a handwheel 67. The spindle 65 is shouldered, as

.at 68, below the plug 66, and this shoulder and the hand-wheel 67 above said plug hold the spindle 65 against endwise movement.

' Thespindle 65 also has a shoulder 69, below 7 the'shoulder 68, and a screw-threaded part 70 to receive a nut 71, and mounted on and se cured to said spindle, between the lower shoulder and said nut is a worm 72. The worm 72'intermeshes with the worm-wheel 46 on the side of said worm-wheel that is adjacent to the outer or rear end of the tailstock 7.

If, now, while the worm-wheel 46 is engaged by the clutch member 53, the spindle 65 be rotated by means of the hand-wheel 67, the worm 72, rotating with said spindle, actuates the worm-wheel 46, with the result that the sleeve 26 is actuated through the medium of intervening parts and members, as previously explained.

The motion imparted to the sleeve 26, when the hand-wheel 67 is rotated, is very forceful, owing to the presence of the intermeshing worm and worm-wheel, but correspondingly slow, while the movement imparted to said sleeve, when the hand-wheel 45 is rotated, is relatively fast but has much less force behind it.

From the foregoing it is seen that a quick, initial, inward movement of the sleeve 26 and consequently of the spindle 28, followed by a slow but forceful final movement, said spindle, and slow but forceful, initial outward movement followed by a quick though less forceful, final movement, may be obtained. Movements of this character are essential in engaging and releasing the work, as will hereinafter be more fully set forth.

Mounted on the screw-threaded part 29 of the head of, the spindle 28 is an expanding chuck, and a similar chuck is similarly mounted on the inner end of the shaft 18. Each of these chucks is described as follows:

A body 73 is internally screw threaded adjacent to the rear end, as represented at 74, to receive the screw-threaded part 29, and has therein a central bore 75 which opens through the front end of said body to receive a stem 76 that extends from the back side of a circular nose-piece 77. The back face is of greater diameter than the front face of the nose-piece 77, and the annular side of said nose-piece tapers or curves from said back inwardly toward the axial center of the nosepiece. A taper pin 78 is employed to retain the nose-piece 77 in place against the inner end of the body 73, said pin passing through suitable lateral openings in said body and the spindle 76, as clearly shown in Fig. 11.

The greater portion of the body 73 is tapered or conical, but at the rear end said body is cylindrical, and the tapped opening (74) is in the cylindrical part.

Each of these chucks is equipped with four work engaging elements, but there may be more or less than that number.

Eachbody 73 has therein, mainly in the conical portion thereof, four slots 79, which slots are equi-distant apart, and the same through said end. The grooves 80 are whatmay betermed'the bottoms ofth'e slots "79, and wholly'within said tapered portion of the body 73/ Each slot '79 is wider than the associated groove 80, and the difference in width is disposed in-equal portions on opposite sides of said groove, The slotted grooves '80 are closed by the nose-piece 77.

Theouter longitudinal edges of each slot 79 are undercut, as at'81 81, to receive a crosshead 82. which forms the innerpart of workgripping jaw the undercut portions 81 of said slot, and said i jaw isstepped to form two angular, worknose-piece 77, and, in the absence 'into contact withsaid nose-piece.

engaging parts 84: and 85 on the outer longitudinal, edge of said jaw. The jaw might be provided with more or less than two of 'these' work-engaging parts or steps. The parts or steps 84 and 85 on the four jaws always project beyond the outer surfaces of the slotted, eon'ica'l portion of the body 73.

There are four openings in the nose-piece 77, which openings are in l ne with the four rooves '80. Each opening 86 extends clear through the nose-piece77 from front to back, and is enlarged attheforward end to receive a head87 on a pin 88 l ocated in said opening.

A pin 89extends inwardlyfrom eachjaw 83 into the groove 80 partially covered by said jaw. A spring 90 has its ends attached to each pair'of associated pins 88 and 89.. The springs 90 act to draw the'jaws 83 toward the of thework, Inasmuch as the'nose-piece covers the open ends of'the slots 79, it is in position to receive the front ends ofthe jaws 83,-'when said jaws are completely released to the springs 90.

' The steps 84 and 85 adapt thejaws 83 to major differences in sizes of bores in the work, the minor dilferences being taken care of by the movement of said jaws on inclined planes.

If a piece of work, such as that represented n91 in Fig. 9, beslipped over the nose-piece 77, it encounters therisers of either the steps 85 or the-steps 843, unless the workbe too large, of course, and forces the j aws 83 rearwardly the slots 79, against the resiliency of the springs 90, until saidjaws bind'so tightly against the inside of the opening in the work that further movement is prevented. This binding contact is made to become sufficient to causethe left-hand chuck to revolve the work,

: andthe latter revolve the right-hand chuck. Upon applying force in the direction, to withdraw the work from the jaws, or the the jaws is possible even when all o'f'the jaws are not forced away from. the nose-piece 77, as would be the case if the diameter of the w'o'rk'91 were equal to the distance between one step 85 and the diametrically opposite step 841.

In practice, assuming'that the sleeve 26 be in its retracted position, as shown in'Fig. 3,

that the clutch member 531s out of engagement with the clutchmember 52, and that the pinch blocks 60 and 61 are out of binding ensuch as atextile-printing roll ,for'examp'le, is mounted at one end on the left hand chuck, and the hand-wheel45 is rotated,'inthe direction to cause thesleeve 26 to be advanced, until the right-hand chuckenters the bore in said roll. The roll orwork engages at each end whatever set of steps (84-85) is 'adaptedito receive it, and the continued rotation of the hand-wheel 15 forces the. right-hand chuck farther and farther into the work and said work farther and farther ontothe left-hand chuck until the frictional resistance between the chucks and the work prevents further rotation of said hand-wheel. Next thehandwheel 48 is rotated in the direction to cause the clutch member 53 to engage the clutch member 52, whenthe hand-wheel 67 is rotated in the direction to cause the sleeve 26 to be forced still farther forwardly, with the resultfthat the two chucks are driven Very tightly and securely into the work. 'By the time the engagement betweenthe chucks and the 'roll is so tightthat further movement of the hand-wheel 67 is prohibited, the work is firmly and securely centered and supported by said chucks, and'the frictional engagement betweenthe parts is so great that the work can be driven by the left hand chuck and in turn can drive or rotate the right-hand chuck, with the spindle 28, during the turning anddressving operationson the work; First, however, it

the roll or work held by and between the two chucks, said work b'eingdriven by the lefthand chuck, as previously stated.

At the end of the turning and dressing operations, the shaft 18 is stopped, the blocks 60 and 61 are loosened to release thesleeve 26',

and the hand-wheel 67 .is rotated in the direction to cause said sleeve to be retracted, and thus draw theright-hand chuck outof the work far enough to loosenthe same. Then the clutch member 53' is disengaged from the clutch member 52, and the right-hand chuck is with'drawnentirely from the wdrk by gagement with said sleeve, a piece of work, 83. The jaw83 is adapted to, slide in one of the slots 79, with the lateral edges of the cross-head 82 on said body in .85

means of the hand-wheel 45, which latter is rotated in the direction to cause the sleeve 26 to be further retracted. Finally the work is withdrawn from the left-hand chuck.

If it were not for the quick action afforded by the mechanism operated by the hand-wheel 45, it would take too long to engage and disengage the chucks with and from the work, and, without the forceful action of which the mechanism operated by the hand-wheel 67 is capable, said chucks could not be engaged sufiiciently tightly with the work. In one case there would be force at the expense of speed, and in the other case speed at the expense of force, and both in suitable proportions are necessary.

More or less change in the shape, size, construction, and arrangement of some or all of the parts of this machine, in addition to those to which attention has hereinbefore been called, may be made, without departing from the spirit of our invention, or exceeding the scope of what is claimed.

We claim:

1. A tail stock structure comprising in combination, a body having a spindle reciprocable therein, a rack on said spindle, an operating sleeve rotatable in the body having a pinion meshing with said rack, a hand wheel on an outer end of said sleeve at a side of said body, an operating shaft rotatable in said body having a hand wheel at another side of said body, a worm on said shaft, a worm gear rotatable on an inner end of said sleeve having a clutch face, a rod rotatable in said sleeve having a hand wheel at its outer end adjacent said first-named hand wheel, a clutch member associated with an inner end of said sleeve and rod for engaging the clutch face of the worm gear, a member reciprocable in a part fixed to said body for actuating said clutch member and means associated with said rod and member whereby the latter is actuated by rotation of the former.

2. A tail stock structure comprising in combination, a body, a spindle reciprocable therein on a horizontal axis, a rack on said spindle, a sleeve rotatable in said body on a horizontal axis disposed transversely to that of said spindle, a rod rotatable in said sleeve, hand wheels at the outer ends of said sleeve and rod, a shaft rotatable in said body on an axis transverse to that of said sleeve and spindle, a. gear on said sleeve meshing with said rack, a worm gear rotatable on theinner end of said sleeve having a clutch face, a worm on said shaft meshing with said gear, a clutch member slidable and non-rotatable on the inner end of said sleeve, a member movable on the inner end of said rod for actuating said member and means associated with said end and member whereby the latter is actuated by rotations of the former.

3. A tail stock structure comprising in combination, a body, having a spindle reciprocable therein and provided with horizontal and vertical bores at adjacent sides of said spindle terminating in a chamber in a side of said body, a plate closing said chamber, a sleeve rotatable in said horizontal bore carrying a pinion meshing with said rack, a rod rotatable in said sleeve, hand wheels at the outer ends of said sleeve and rod, a shaft rotatable in said vertical bore having a hand wheel on its outer end, a worm gear rotatable on the inner end of said sleeve in said chamber provided with a clutch face, a worm engaging with said gear on the inner end of said shaft, a clutch member slidable and nonrotatable on the inner end of said sleeve, a

member slidable and non-rotatable in said plate and an inner end of said rod being in screw threaded engagement with said member whereby the member is reciprocated by rotation of the rod to move the clutch meml- 1'wf. (TO' h 1 col 1:.-0 en a ement wit 1 t e c utch face of the gear.

ROBERT A. JOHNSON. EARLE MERRITT CHASE. 

